Manufacturer's product description:

Please note: This product is currently not available in the US.

It's always very pleasant to observe the Sun, not only during solar eclipses. The number of sunspots changes permanently, as well as their shape and size. Depending on magnification, you may even be able to discern the core and boundary areas of a sunspot (umbra and penumbra). The one essential condition for any solar observation is to reduce the sunlight to under 1/100.000 of its normal brightness, which is a no risk amount for the eyes. The Astro-Solar sun filter foil meets that standard. Simply fitted to the front of the telescope tube, this foil doesn't fall short of pricey plane-parallel glass filters in any way. The coating is subjected to permanent quality control. The multiple metal coating of the foil produces a remarkably even filter effect.

Technical data:

film size: DIN A4 (210 x 297 mm)

filter efficiency: 99.999 % (ND = 5.0)

film thickness: 0.012 mm

absolutely clear and bubble-free substrate (non-Mylar)

instrument requirements: for telescopes, binoculars, spotting scopes and eyeepieces of up to 152mm aperture

Downloads:

Customer reviews:

A neccessary accessory

Review by R. K.
on 09.03.2014 14:46:40

Rating:

( 5 / 5 )

This foil truly does what it promises. It provides a clear view of the Sun, in which the Sun is white/yellowish and the sky adjacent to it is black.
Already on my first observation at 20x magnification I could see a spot. Bringing it up to 50x revealed the spot consisting of two smaller spots. When your eye accommodates to observing, finer aggregations of spots can be seen.
I recommend this foil to anyone because it gives your scope more functionality.

P.S. The foil actually does not look as bad as it seems on the picture above. It is really a silvery clean sheet.